Contents
What is Clojure namespace?
Namespaces are mappings from simple (unqualified) symbols to Vars and/or Classes. Namespaces are also dynamic, they can be created, removed and modified at runtime, at the Repl etc. The best way to set up a new namespace at the top of a Clojure source file is to use the ns macro.
How do you change your namespace in Clojure?
Use the in-ns REPL special to switch to an existing namespace. It can also be used to create a new namespace. Use require to load namespaces into the REPL, and then use in-ns to switch to them.
What is Clojure Main?
The clojure. main namespace provides functions that allow Clojure programs and interactive sessions to be launched via Java’s application launcher tool java .
Is Clojure implemented in Java?
All functions are compiled to JVM bytecode. Clojure is a great Java library consumer, offering the dot-target-member notation for calls to Java. Clojure supports the dynamic implementation of Java interfaces and classes.
How to create a new namespace in Clojure?
The best way to set up a new namespace at the top of a Clojure source file is to use the ns macro. By default this will create a new namespace that contains mappings for the classnames in java.lang plus clojure.lang.Compiler, and the functions in clojure.core.
Which is a fully qualified var name in Clojure?
For example, clojure.string/join is a fully-qualified var name where clojure.string refers to the namespace and join refers to the var inside the namespace. All vars are globally accessible via their fully-qualified name.
How are strings manipulated and processed in Clojure?
Provides most standard string manipulation and processing function that you’d expect in any general-purpose programming language. In Clojure and ClojureScript strings are represented using the native platform implementation, and can be directly manipulated, e.g. (.toLowerCase “FOO”) ;=> “foo”.
How to start up my app in Clojure?
1 Start up a REPL. 2 Load the app: user=> (require ‘ [clojure.tools.namespace.repl :refer [refresh]]) user=> (refresh) user=> (def my-app (start-my-app)) 3 Test it out. 4 Modify some source files. 5 Restart: